U盘来仿一个USB_KEy

public const int WM_DEVICECHANGE = 0x219;
public const int DBT_DEVICEARRIVAL = 0x8000;
public const int DBT_CONFIGCHANGECANCELED = 0x0019;
public const int DBT_CONFIGCHANGED = 0x0018;
public const int DBT_CUSTOMEVENT = 0x8006;
public const int DBT_DEVICEQUERYREMOVE = 0x8001;
MessageBox.Show("7");
break;
case DBT_DEVICETYPESPECIFIC:
MessageBox.Show("8");
try
{
if (m.Msg == WM_DEVICECHANGE)
{
switch (m.WParam.ToInt32())
{
break;
case DBT_DEVNODES_CHANGED://可用，设备变化时
// MessageBox.Show("9");
break;
using System.Windows.Forms;
using System.IO;
using System.Data;
using System.Data.SqlClient;
namespace USB
{
public partial class Form1 : Form
{
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
{
cmd.Parameters.AddWithValue("@name", LineDate);
con.Open();
using (SqlConnection con = new SqlConnection(sql))
{
using (SqlCommand cmd = new SqlCommand("select * from T_user where name=@name", con))
{
if (drive.DriveType == DriveType.Removable)
{
richTextBox1.AppendText("U盘已插入，盘符为:" + .ToString() + "\r\n");
case DBT_DEVICEREMOVECOMPLETE: //U盘卸载
break;
case DBT_DEVICEREMOVEPENDING:
public const int DBT_DEVICEQUERYREMOVEFAILED = 0x8002;
public const int DBT_DEVICEREMOVECOMPLETE = 0x8004;
public const int DBT_DEVICEREMOVEPENDING = 0x8003;
case WM_DEVICECHANGE://
break;
case DBT_DEVICEARRIVAL://U盘插入
InsertUDiskOper();
case DBT_CONFIGCHANGED:
MessageBox.Show("3");
break;
case DBT_CUSTOMEVENT:
MessageBox.Show("4");
break;
case DBT_DEVICEQUERYREMOVE:
MessageBox.Show("5");
FileStream fs = new FileStream(Deviced + "\\" + "userkey.dat", FileMode.Open);
StreamReader sr = new StreamReader(fs);
Deviced = .ToString(); //行到
if (File.Exists(Deviced + "\\" + "userkey.dat"))
{
}
private void Form1_Load(object sender, EventArgs e)
{
}
protected override void WndProc(ref Message m)
{
private void InsertUDiskOper()
{
bool sign = false;
DriveInfo[] s = DriveInfo.GetDrives();
foreach (DriveInfo drive in s)
MessageBox.Show("11");
break;
default:
break;
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
public const int DBT_USERDEFINED = 0xFFFF;
public string Deviced = "";
public Form1()
{
InitializeComponent();
USB_Key的实现方法 using Sy Nhomakorabeatem;
using System.Collections.Generic;
using ponentModel;
using System.Data;
using System.Drawing;
using System.Text;
break;
case DBT_CONFIGCHANGECANCELED:
MessageBox.Show("2");
break;
public const int DBT_DEVICETYPESPECIFIC = 0x8005;
public const int DBT_DEVNODES_CHANGED = 0x0007;
public const int DBT_QUERYCHANGECONFIG = 0x0017;
case DBT_QUERYCHANGECONFIG:
MessageBox.Show("10");
break;
case DBT_USERDEFINED:
break;
case DBT_DEVICEQUERYREMOVEFAILED:
MessageBox.Show("6");
break;
string LineDate = "";
while ((LineDate = sr.ReadLine()) != null)
{
base.WndProc(ref m);
}
/// <summary>
/// U盘插入时的操作
/// </summary>
string sql = "server=.\\sqlexpress;initial catalog=Mytest1;integrated security=true";